Revert of remove guarded code - there are no more callers (https://codereview.chromium.org/343783002/)

Reason for revert:
webkit still uses getTotalClip -- need to find where they define the guard.

../../skia/ext/skia_utils_mac.mm:400:42: error: no member named 'getTotalClip' in 'SkCanvas'
      const SkRegion& clipRgn = canvas_->getTotalClip();
                                ~~~~~~~  ^

Original issue's description:
> remove guarded code - there are no more callers
>
> BUG=skia:
>
> Committed: https://skia.googlesource.com/skia/+/c5d5cf9489977aa6fba077d1dc242029fbb4859e

R=scroggo@google.com, reed@google.com
TBR=reed@google.com, scroggo@google.com
NOTREECHECKS=true
NOTRY=true
BUG=skia:

Author: reed@chromium.org

Review URL: https://codereview.chromium.org/342843002

include/core/SkCanvas.h

@@ -1111,6 +1111,15 @@ public:
     virtual ClipType getClipType() const;
 #endif
 
+#ifdef SK_SUPPORT_LEGACY_GETTOTALCLIP
+    /** DEPRECATED -- need to move this guy to private/friend
+     *  Return the current device clip (concatenation of all clip calls).
+     *  This does not account for the translate in any of the devices.
+     *  @return the current device clip (concatenation of all clip calls).
+     */
+    const SkRegion& getTotalClip() const;
+#endif
+
     /** Return the clip stack. The clip stack stores all the individual
      *  clips organized by the save/restore frame in which they were
      *  added.

include/effects/SkLayerRasterizer.h

@@ -1,3 +1,4 @@
+
 /*
  * Copyright 2006 The Android Open Source Project
  *
@@ -5,6 +6,7 @@
  * found in the LICENSE file.
  */
 
+
 #ifndef SkLayerRasterizer_DEFINED
 #define SkLayerRasterizer_DEFINED
 
@@ -62,9 +64,24 @@ public:
         SkDeque* fLayers;
     };
 
+#ifdef SK_SUPPORT_LEGACY_LAYERRASTERIZER_API
+    void addLayer(const SkPaint& paint) {
+        this->addLayer(paint, 0, 0);
+    }
+
+    /**    Add a new layer (above any previous layers) to the rasterizer.
+        The layer will extract those fields that affect the mask from
+        the specified paint, but will not retain a reference to the paint
+        object itself, so it may be reused without danger of side-effects.
+    */
+    void addLayer(const SkPaint& paint, SkScalar dx, SkScalar dy);
+#endif
+
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkLayerRasterizer)
 
 protected:
+    SkLayerRasterizer(SkDeque* layers);
+    SkLayerRasterizer(SkReadBuffer&);
     virtual void flatten(SkWriteBuffer&) const SK_OVERRIDE;
 
     // override from SkRasterizer
@@ -72,12 +89,17 @@ protected:
                              const SkIRect* clipBounds,
                              SkMask* mask, SkMask::CreateMode mode) const;
 
-private:
-    const SkDeque* const fLayers;
-
+#ifdef SK_SUPPORT_LEGACY_LAYERRASTERIZER_API
+public:
+#endif
     SkLayerRasterizer();
-    SkLayerRasterizer(SkDeque* layers);
-    SkLayerRasterizer(SkReadBuffer&);
+
+private:
+#ifdef SK_SUPPORT_LEGACY_LAYERRASTERIZER_API
+    SkDeque* fLayers;
+#else
+    const SkDeque* const fLayers;
+#endif
 
     static SkDeque* ReadLayers(SkReadBuffer& buffer);
 

src/core/SkCanvas.cpp

@@ -5,6 +5,7 @@
  * found in the LICENSE file.
  */
 
+
 #include "SkCanvas.h"
 #include "SkBitmapDevice.h"
 #include "SkDeviceImageFilterProxy.h"
@@ -1772,6 +1773,12 @@ SkCanvas::ClipType SkCanvas::getClipType() const {
 }
 #endif
 
+#ifdef SK_SUPPORT_LEGACY_GETTOTALCLIP
+const SkRegion& SkCanvas::getTotalClip() const {
+    return fMCRec->fRasterClip->forceGetBW();
+}
+#endif
+
 const SkRegion& SkCanvas::internal_private_getTotalClip() const {
     return fMCRec->fRasterClip->forceGetBW();
 }

src/core/SkPaintPriv.cpp

@@ -88,6 +88,9 @@ bool NeedsDeepCopy(const SkPaint& paint) {
     return false
 #ifdef SK_SUPPORT_LEGACY_SHADER_LOCALMATRIX
            || paint.getShader()
+#endif
+#ifdef SK_SUPPORT_LEGACY_LAYERRASTERIZER_API
+           || paint.getRasterizer()
 #endif
            || paint.getImageFilter()
            ;

src/effects/SkLayerRasterizer.cpp

@@ -1,3 +1,4 @@
+
 /*
  * Copyright 2006 The Android Open Source Project
  *
@@ -5,6 +6,7 @@
  * found in the LICENSE file.
  */
 
+
 #include "SkLayerRasterizer.h"
 #include "SkDraw.h"
 #include "SkReadBuffer.h"
@@ -48,6 +50,17 @@ SkLayerRasterizer::~SkLayerRasterizer() {
     clean_up_layers(const_cast<SkDeque*>(fLayers));
 }
 
+#ifdef SK_SUPPORT_LEGACY_LAYERRASTERIZER_API
+void SkLayerRasterizer::addLayer(const SkPaint& paint, SkScalar dx,
+                                 SkScalar dy) {
+    SkASSERT(fLayers);
+    SkLayerRasterizer_Rec* rec = (SkLayerRasterizer_Rec*)fLayers->push_back();
+
+    SkNEW_PLACEMENT_ARGS(&rec->fPaint, SkPaint, (paint));
+    rec->fOffset.set(dx, dy);
+}
+#endif
+
 static bool compute_bounds(const SkDeque& layers, const SkPath& path,
                            const SkMatrix& matrix,
                            const SkIRect* clipBounds, SkIRect* bounds) {